Stoker hood



Oct. 5, 1937. CQH. HALL ET AL STOKER HOOD Filed July 9, 1952 5 Sheets-Sheet l INVENTOR CaRT/CEMHALL FREDf/F/CK L/l/ZUFR BY ATTORNEY Oct. 5, 1937. c. H. HALL ET AL STOKER HOOD Filed July 9, 1932 3 Sheets-Sheet. 2

I INVENTOR CORT/6E H. HALL FRt'DER/CK LH/LDER C. H. HALL ET AL STOKER HOOD Filed July 9, 1952 3 Sheets-Sheet 3 R L fl L M RAH Y wM W ma Wm 32/ Patented Oct. 5, 1937 UNITED STATES PATENT orrics STOKER HOOD Cortice H. Hall, Glen Rock, and Frederick Lee Hilder, Clifton, N. .L, assignors, by mesne assignments, to Electric Furnace-Man, Inc., New York, N. Y., acorporation of New York Application July 9, 1932, Serial No. 621,626

9 Claims. (01. 110-108) to form downwardly projecting edges adapted to i This invention relates to hoods and more particularly to a hood adapted to fit over the hopper and actuating mechanism of a household stoker of the type described, for example, in the Wightman Reissue Patent Number 17,925 or in application Serial Number 501,481 filed December 11', 1930 by Cortice H. Hall, now Patent No. 2,033,706,

' or application Serial No. 621,624, filed July 9, 1932 for Stokers" now Patent Number 2,077,882. 4 In the use of stokers described in the above mentioned patents for household heating appliances there has been some objection to the noise from the operating unit and to dust and fumes escaping from the hopper. It is an object of the present invention to provide a hood of improved "construction whereby the above objections may be avoided. Other objects will become apparent. In describing the invention, reference will be made to the drawings in which Figure l is a front .20 elevation of the hood; Figure 2 is a top plan view;

Figure 3 is a sectional view of the hood, the cover being also shown in dotted lines in an open position and the lower portion of the hopper, air duct and stoker mechanism being shown in side elevation; Figure 4 is an enlarged section on the line 4-4 of Figure 3; Figure 5 is a fractional horizontal section through a rear corner of the hood;

Figure 6 is a vertical section taken on line 6-6 of Figure 5; and Figure 7 is a vertical section taken 30 on line 1-1 of Figure 6.

In the several figures, the numeral Iii designates the hopper of a unit such, for example, as that shown inlzhe aforementioned patents, which is supported by a fuel conduit II, and which delivers the-solid fuel, such as coal, to the fuel conduit l I where it is fed by a screw conveyor I la or other suitable feeding device to the burner (not shown). The ashes from the burner are removed through a conduit l2 and conveyed through an elevator i3 to a suitable ash receptacle (not shown). The air for the burner is forced from a blower l4 through a conduit Ma leading to the burner. Suitable driving mechanism, such as the motor I5, is provided for driving the feeding device, the ash removing and elevating devices and the blower. Various modifications of such devices are more fully described in the aforementioned patent and applications and are well known in this art.

In the embodiment shown of the present invention the top portion l6 of the hood is supported upon the top of the hopper III, as illustrated more clearly in Figures 3 and 4. The four sides l1, l8, l9, and of the hood have their top portions bent inwardly and downwardly, as at 2|,

fit into and be supported by the upwardly turned portion 22 of the top. The ends of the sides I9 and 20 are turned in to form inwardly projecting edges 23 and the ends of the front and back I! and I3 are turned in to form inwardly projecting edges 24, as illustrated more clearly in Figures 5,

6, and 7. At each corner a button is provided in the edge 24 and a slot 26, adapted to receive and retain the projecting head of said button, is provided at each cornerin the projection 23.

In assembling the hood the top I6 is first rested upon the hopper Ill. The front and back, I! and I8 respectively, are then hung upon the depending upturned edges 22 at the front and back of the top I6. The sides [9 and 20 are then hung upon the depending upturned edges 22 at the sides of the top i 6. During the latter operation, heads of the button 25 are passed through the enlarged portions of the slots 26 and as the sides are lowered the narrowed portions of the slots 26 surround the shanks of the button 25 and lock the sides in position.

The side I9 of the hood is provided with an opening 21 to receive the ash elevator and an opening 28 to receive a control handle for regulating the quantity of fuel and" air supplied to the burner. The front I! of the hood may be provided with a sliding door 29 by which access may be had to the operating mechanism under the hood.

In order to prevent the escape of fumes from the hopper when the burner is in operation and the flyingof dust when the coal is shovelled into the hopper ill, the hood is provided with means for drawing the air, supplied to the burner, through the top of the hood and over the top of the hopper. This is,accomplished by means of an air duct 30 which is connected at its lower end by a conduit 3| to the inlet for the blower M. This duct 30 is shown as fastened to and extending from the front of the hopperl0 and having at its upper end an opening 32 which communicates with a conduit 33 closed at its ends and which extends along the front of the top I 6. This conduit 33 has a slot 34 extending along the rear portion of its bottom surface and communicating with the interior of the hopper Ill. The cover 35 of the top i6 is provided with louvers 36 through which the air may be drawn when the cover is in the closed position.

A screen 31 is supported in the top l6 above the hopper I0 whereby sticks and nails or other foreign matter and large pieces of coal may be retained. The top- I6 is also provided with plates (as illustrated in dotted lines in Figure 3) the plates will fill the spaces between the sides of the cover 35 and the sides 'of the top l6. By means of these plates 38, 38 the cover may be conveniently supported in the open position and the escape of coal and dust at the sides of the cover will be prevented.

In normal operation, the air supplied to the burner by the blower M will be drawn through the louvers 36 in the cover 35 and the screen 31. It will then pass through the openings 34 and 32 and through the conduits 30 and 3| to the fan inlet. Any fumes which may be discharged from the burner through the fuel in the hopper will be drawn with the air into the blower and will not escape into the surrounding room. When the cover 35 is opened the plates 38, 38 will close the sides of the opening left thereby and the air drawn into the blower will enter through the opening where the coal is being introduced. Dust arising from this operation 'will be drawn into the air intake and will not escape into the room. After the coal has been introduced the cover 35 may be closed and the air will again be drawn through the louvers 36.

It is apparent that many modifications may be made in the design and construction of the device described to accommodate it to particular coal stoking devices and it is not intended to limit the invention to the particular embodiment shown and described by way of illustration. It is also apparent that many modifications may be made \in the details of construction of the hood without departing from the scope of the invention.

The terms used in describing and claiming this invention have been used in their descriptive sense and not as terms of limitation and it is intended that all equivalents thereof be included within the scope of the appended claims.

What we claim is:

1. A device as defined in claim 8 which is provided with a hinged cover and side plates at two sides hinged so that they may be swung into position and close the space between the cover and the hood at said two sides.

2. A device as described in claim 8 in which the sides depend from said cover and are locked together.

3. A device as described in claim 8 in which the cover is provided with a hinged door and hinged, door supporting means for filling the spaces between the side edges of the door and the cover when the door is opened.

4. In a device of the type described, a hopper, a coarse screen across the top of said hopper, a cover extending over the top of said hopper, a hinged door in said cover, said hinged door having hinged plates along two sides thereof and shaped to fill the spaces between the side edges of said door and the screen when the door is in its raised position and foldable across said screen when the door is closed, said plates serving to support said door in raised position. i

5. The combination with a hopper for solid fuel, a conduit forconducting fuel from said hopper to a burner and a mechanism for conveying said fuel through said conduit, of a cabinet substantially completely covering and surrounding said hopper and fuel conveying mechanism, a blower having an intake within said cabinet and means for admitting air to said cabinet in such a manner that a current of air may be drawn into said blower from above the hopper.

6. The combination with a hopper for solid fuel,

a conduit for conducting fuel from said hopper to a burner, amechanism for conveying said fuel through said conduit, and a blower for conducting air to said burner, of a cabinet substantially completely covering and surrounding said hopper, fuel conveying mechanism and blower, a conduit for conveying air from the upper portion of said hopper to the intake side of the air blower within said cabinet, and amovable cover on said cabinet having openings through which air supplied to said air blower may be drawn.

7. The combination with a hopper for solid fuel, a conduit for conducting fuel from said hopper to a burner, and a mechanism for conveying said fuel through said conduit, of a cabinet substantially completely covering and surrounding said hopper and fuel conveying mechanism, means for admitting air to said cabinet, and a blower for supplying air to said burner and having an intake within said cabinet whereby substantially all of the air supplied to said burner is drawn through the means for admitting air to said cabinet.

8. In a device of the type described, a fuel hopper, a cover for said hopper, a conduit for conducting fuel from said'hopper to a burner, a fuel feeding mechanism positioned beneath said cover for feeding fuel through said burner conduit, sides extending'downwardly from said cover and enclosing said fuel feeding mechanism and hopper in a hood, an air blower for feeding air to said burner for combustion of said fuel, a conduit communicating with the intake of said blower and communicating with the upper portion of the hopper for drawing air from above the fuel in said hopper.

9. The combination with a solid fuel hopper,

a conduit for conducting fuel from said hopper to a burner, a mechanism for feeding fuel from said hopper through said conduit, and a blower for supplying air to said burner, of a cabinet surrounding said hopper, the portion of said conduit adjacent said hopper, said mechanism and said blower; said cabinet having an opening for admitting air thereinto, and said blower having an intake within said cabinet and being arranged to create a current of air passing into said cabinet through said opening.v

COR'I'ICE H. HALL. FREDERICK LEE HIIDER. 

